Perhaps you should try some spelling variations:
test trial » post trial, test material
dong skin » dong bin, dof skin
test tran » test strain, test track, test trace
dong nan » dong yang, dong bin, dong cao
thi hong » tan hong
hong shu » cong shu, tong shui, wong shiu
sin » sign, sind, sein

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong nan) or (((dong skin) OR (dong sin)))) ya hua ((test tran) or (test trial)) thi hong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong nan) OR (((dong skin) OR (dong sin)))) ya hua ((test tran) OR (test trial)) thi hong shu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong nan) or (((dong skin) OR (dong sin)))) ya hua ((test tran) or (test trial)) thi hong shu ;".
• Adding a wildcard symbol may retrieve word variants: ((dong nan) or (((dong skin) OR (dong sin)))) ya hua ((test tran) or (test trial)) thi hong shu ;*.